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  • Why do people use programming books?

    - by Alex Hope O'Connor
    I find that when someone asks what is the best way to learn how to program, people usually provide them with references to a bunch texts written by various authors. However I don't believe many people at all learn to program from books? I find that they are usually faced with a challenge and then use programming as tool to overcome it. For example I 'got into' programming because I wanted to start a server for a game I was playing, so I googled and read through the support for that particular server and now I am a employed software engineer, using only the skills I developed (and then further developed) by coding C# scripts for a not very popular server package. So my question is, do people generally find it easier to learn from these books? I know I have looked at a few of them and found them far too 'dry' to encourage me to finish it.

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  • What types of programming contest problems are there?

    - by Alex
    Basically, I want to make a great reference for use with programming contests that would have all of the algorithms that I can put together that I would need during a contest as well as sample useage for the code. I'm planning on making this into a sort of book that I could print off and take with me to competitions. I would like to do this rather than simply bringing other books (such as Algorithms books) because I think that I will learn a lot more by going over all of the algorithms myself as well as I would know exactly what I have in the book, making it more efficient to have and use. So, I've been doing research to determine what types of programming problems and algorithms are common on contests, and the only thing I can really find is this (which I have seen referenced a few times): Hal Burch conducted an analysis over spring break of 1999 and made an amazing discovery: there are only 16 types of programming contest problems! Furthermore, the top several comprise almost 80% of the problems seen at the IOI. Here they are: Dynamic Programming Greedy Complete Search Flood Fill Shortest Path Recursive Search Techniques Minimum Spanning Tree Knapsack Computational Geometry Network Flow Eulerian Path Two-Dimensional Convex Hull BigNums Heuristic Search Approximate Search Ad Hoc Problems The most challenging problems are Combination Problems which involve a loop (combinations, subsets, etc.) around one of the above algorithms - or even a loop of one algorithm with another inside it. These seem extraordinarily tricky to get right, even though conceptually they are ``obvious''. Now that's good and all, but that study was conducted in 1999, which was 13 years ago! One thing I know is that there are no BigNums problems any more (as Java has a BigInteger class, they have stopped making those problems). So, I'm wondering if anyone knows of any more recent studies of the types of problems that may be seen in a programming contest? Or what the most helpful algorithms on contests would be?

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  • ssrs: the report execution has expired or cannot be found

    - by Alex Bransky
    Today I got an exception in a report using SQL Server Reporting Services 2008 R2, but only when attempting to go to the last page of a large report: The report execution sgjahs45wg5vkmi05lq4zaee has expired or cannot be found.;Digging into the logs I found this:library!ReportServer_0-47!149c!12/06/2012-12:37:58:: e ERROR: Throwing Microsoft.ReportingServices.Diagnostics.Utilities.ReportServerStorageException: , An error occurred within the report server database.  This may be due to a connection failure, timeout or low disk condition within the database.;I knew it wasn't a network problem or timeout because I could repeat the problem at will.  I checked the disk space and that seemed fine as well.  The real issue was a lack of memory on the database server that had the ReportServer database.  Restarting the SQL Server engine freed up plenty of RAM and the problem immediately went away.

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  • Can you delete the Humanity icon theme safely?

    - by Alex
    I'm trying to reduce used space after running disk usage analyser, since I'm using a 40GB SSD. The icons use quite a bit of space! Could I delete those that I don't use, such as humanity? (I use Faenza-Dark) If it is possible, what would be the best way to this? as when I attempt to remove humanity in the Software Centre it says the software-centre itself must be removed. Similar problems arise with synaptic package manager. I was wary of just deleting the unused directories in usr/share/icons/. Thanks for the help!

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  • Can't pipe or redirect cygwin grep output

    - by Thomas
    How do I get grep to work properly in a regular cmd.exe? > grep -o 'ProductVersion\".*\".*\"' foo.txt | grep -o '[0-9]+\.[0-9]+\.[0-9]+\.[0-9]+' foo.txt:ProductVersion" Value="59.59.140.59" grep: |: No such file or directory grep: grep: No such file or directory grep: [0-9]+\.[0-9]+\.[0-9]+\.[0-9]+: No such file or directory and > grep -o 'ProductVersion\".*\".*\"' foo.txt >> blah.txt foo.txt:ProductVersion" Value="59.59.140.59" grep: >>: No such file or directory grep: blah.txt: No such file or directory

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  • Corrupted Ambiance Theme

    - by Alex
    I have a corrupted Ambiance theme... the background of the top menus is grey :( i must have done some fiddling... If i choose another theme, it seems to work fine, but I want Ambiance :D what do you think i could try? I already tried downloading ambiance again, but same issue happens. I tried to download gnome color chooser, but it doesn't do nothing, so i guess maybe i can change something else... but where? Here's a screenshot:

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  • AsyncBridge? Async on .NET 4.0 using VS11

    - by Alex.Davies
    I've just found something quite cool. It's a code snippet that lets you use the real VS 11 C#5 compiler to write code that uses the async and await keywords, but to target .NET 4.0. It was published by Daniel Grunwald (from SharpDevelop).That means I can stop using the Async CTP for VS2010, which is not at all supported anymore, and a pain to install if you have windows updates turned on. Obviously I couldn't ask all my users to install .NET 4.5 beta, but .NET Demon is a VS 2010 extension, so we already have .NET 4.0. At the time of writing, VS11 is in beta still, but hopefully it's stable enough for my team to use!I would have written the code myself, but I had the wrong impression that the C# 5 beta compiler only looked in mscorlib for the helper classes it needs to implement async methods. Turns out you can provide them yourself. You can get the code here: https://gist.github.com/1961087You just add it to your project, and the compiler will apparently pick it up and use it to implement async/await. I'm at my parents' place for Easter without access to a machine with VS 11 to try it out. Let me know whether you get it to work!This reminds me of LINQBridge, which let us use C# 3 LINQ, but only require .NET 2. We should stick up a webpage to explain, with a nice easy dll, put it in nuget, and call it AsyncBridge.If you were really enthusiastic, you could re-implement the skeleton of the Task Parallel Library against .NET 2 to use async/await without even requiring .NET 4. Our usage stats suggest that practically everyone that uses Red Gate tools already has .NET 4 installed though, so I don't think I'll go to the effort.

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  • How do you coordinate with interaction designers during implementation?

    - by Alex Feinman
    Programmers are largely responsible for helping move a product from design to implementation. This process is always full of snags: implementation details rear their ugly head and make parts of the design infeasible user feedback on early prototypes leads to changes in the design new technologies alter the field of what is possible, bringing back designs previously thought impossible priorities shift, schedules change, and requirements wander How do you keep design and implementation in contact during the implementation? What processes do you use? Tools? Artifacts? Guidelines? Communication strategies?

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  • I've created a software RAID on SUSE EL 10 and now I need to monitor it.......

    - by Thomas B.
    I have created a Software Raid using the yast2 GUI on SUSE ES 10/11. The raid works great and it's a raid 5. I have 5 Drives they are cheap 2GB Cases that have 2 - 1TB Drives in each case (Serial ATA Drives) and I connect them in via Esata to the motherboard. The problem I have as this is "cheap" storage when of the the 5 drives goes out on the RAID I seem to have no logs of any issues and it get's harder and harder to write to it until it dies. I use SAMBA to mount the 4TB parition to my PC's in my home on a GIG network. My question is this, are there any good (Free) tools in Linux to monitor a raid or the drives on the raid to detect any problems??? I haven't found any yet and was just wondering if some exist.

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  • Where to go after having a good grasp of a language?

    - by Alex M.
    I have been programming as a hobby for the past few years now (most of high school and 1 year in cs in college) and although I've came to the conclusion that a career in CS isn't for me I switched over to math (which pairs what I love about programming with my interest in physical sciences) but I miss writing code. Recently I've had an interest in low-level programming. Understanding how compilers work, learning some basics of assembly language and trying to get out of my comfort zone. The problem is that since I've been out of the CS programs, I'm not faced with much opportunities to write code. I do intend to take a few CS classes in college (a lot of CS stuff is opened to math majors) but that won't come for until next year. So I ask: What are the steps to take in order to keep improving as a programmer once you're passed the basic steps? How do you find projects to keep you going? Beside my newly discovered interest in assembly language, I've been writing code in C and have been interested in FOSS. Thanks!

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  • Can't find second partition on encrypted drive with two partitions

    - by Thomas Uhrig
    I have a drive with two partitions, a system partition (Windows 7) and a partition just for data. Both are encrypted with the same password. I didn't had any problems, but yesterday my laptop gets broken. Now, I'm trying to connect the drive via USB to a new laptop and read it. The problem is, that I only see the system partition, not the one with my data. When I click on "Select Device", I can see my drive as "Harddisk 1" with 300 gb. But I only see a single partition "Partition1" with 117 gb. I'm unable to find the second one. It's not a hidden partition. Any ideas? Thanks.

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  • Automatic Excel Script

    - by Thomas
    I am a 6th year medical student and I'm working on my thesis. I have no experience with programming whatsoever, a friend recommended me to post my question here. I am strugling with the following problem: I have data of 400 patients, stored in 400 different excel files. Each file contains 34 columns in a specific order, let's say A to Z. The order is the same in each of these 400 files. Now I need to a make a new excel document that contains the first column of each patient. So I need all the first columns of my 400 different excel files, lined up next to each other in a new document. Preferebally in the form of a automatic script. After that I want to do the exact same thing but for the second column, then the third and so on. This is probably a problem that has already been solved. Otherwise could someone help me out? You have my thanks!

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  • Can't adjust brightness on a Sony Vaio T13 ultrabook

    - by Alex Barreira
    I recently installed Ubuntu 12.04 alongside Windows 7 in a Vaio T13 ultrabook. I cannot use the the Fn+F4 or Fn+F5 to change the brightness. The bubble appears indicating that brightness is being changed but with no visual impact on the screen. I've tried many solutions involving the manipulation of the /etc/default/grub file but none of them worked. Whenever I tried this manipulation the screen still didn't change, however the bubble stopped functioning properly. This is not a problem of the Fn shortcut. Even when I try to change it in the Brightness and Lock on System Settings, the bar does scroll but the screen remains unchanged. Does any one has a way around this mystery?

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  • AdSense Custom Search Ads - custom quesry

    - by Alex
    i'm trying to set up a custom search ad, but I am nost sure about the query. On the site it says (https://developers.google.com/custom-search-ads/docs/implementation-guide) 'query' should be dynamic based on your page. This variable targets the ads and therefore should always match what the user on your site has just performed a search for. Now, what I understand is: I have to program my page so that the query variable contains some custom words. Am I right? If a user gets to my site through clicking on an adsense, there is no way to "know" what the user looked for and display my query accordingly, right? Thanks for any help!

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  • Syncing Multiple Google Calendars and with Outlook and Android

    - by Fred Thomas
    Perhaps this is a multipart question, but I deal with a lot of calendars in my life, and want to know if there is some way to sync them all together, and maintain appropriate privacy. So I have a family calendar that my ex and I maintain for kid events, and I have a personal calendar for my own life, and I have an Outlook work calendar, for work. Ideally I'd look at my calendar on my Android phone. Is it possible to sync them all together? Is it possible for there to be one calendar to rule them all on my phone, but have the other calendars blank out spaces that are from other calendars, but only show the blanked out without the details. (I don't want my date with Miss Hottie to appear that way on the family calendar, and I probably don't want my visit to the proctologist to appear in the corporate exchange server.) Are there tools available to do this? Bonus question, can I do the same with my to do lists? Double bouns question -- how can I solve world hunger and help us to all live together in peace? :-)

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  • SSL connection error during handshake on Windows Server 2008 R2

    - by Thomas
    I have a Windows 2008 R2 Server that runs a HTTPS Tunneling service. The software uses a certificate that is provided via the Windows certificate store. The certificate is located in the local computer private certificates. It supports server and client authentication with signing and keyencipherment. Cert chain The certificate chain looks fine. It's a Thawte SSL123 certificate. Thawte Premium Server CA (SHA1) [?e0 ab 05 94 20 72 54 93 05 60 62 02 36 70 f7 cd 2e fc 66 66] thawte Primary Root CA [?1f a4 90 d1 d4 95 79 42 cd 23 54 5f 6e 82 3d 00 00 79 6e a2] Thawte DV SSL CA [3c a9 58 f3 e7 d6 83 7e 1c 1a cf 8b 0f 6a 2e 6d 48 7d 67 62] Server certificate Issues Most browsers accept the certificate without any warning. But IE 7 on Windows XP SP3 and Opera 12 on OSX just report an connection error. Opera complains: Secure connection: fatal error (552) https://www.example.com/ Opera was not able to connect to the server, because the server does not communicate via any secure protocol known to Opera. A connection test using openssl s_client -connect www.example.com:443 -state says: CONNECTED(00000003) SSL_connect:before/connect initialization SSL_connect:SSLv2/v3 write client hello A 52471:error:140790E5:SSL routines:SSL23_WRITE:ssl handshake failure:/SourceCache/OpenSSL098/OpenSSL098-35.1/src/ssl/s23_lib.c:182: ssldump -aAHd host www.example.com during curl https://www.example.com/ reports: New TCP connection #1: localhost(53302) <-> www.example.com(443) 1 1 0.0235 (0.0235) C>SV3.1(117) Handshake ClientHello Version 3.1 random[32]= 50 77 56 29 e8 23 82 3b 7f e0 ae 2d c1 31 cb ac 38 01 31 85 4f 91 39 c1 04 32 a6 68 25 cd a0 c1 cipher suites Unknown value 0x39 Unknown value 0x38 Unknown value 0x35 TLS_DHE_RSA_WITH_3DES_EDE_CBC_SHA TLS_DHE_DSS_WITH_3DES_EDE_CBC_SHA TLS_RSA_WITH_3DES_EDE_CBC_SHA Unknown value 0x33 Unknown value 0x32 Unknown value 0x2f Unknown value 0x9a Unknown value 0x99 Unknown value 0x96 TLS_RSA_WITH_RC4_128_SHA TLS_RSA_WITH_RC4_128_MD5 TLS_DHE_RSA_WITH_DES_CBC_SHA TLS_DHE_DSS_WITH_DES_CBC_SHA TLS_RSA_WITH_DES_CBC_SHA TLS_DHE_RSA_EXPORT_WITH_DES40_CBC_SHA TLS_DHE_DSS_EXPORT_WITH_DES40_CBC_SHA TLS_RSA_EXPORT_WITH_DES40_CBC_SHA TLS_RSA_EXPORT_WITH_RC2_CBC_40_MD5 TLS_RSA_EXPORT_WITH_RC4_40_MD5 Unknown value 0xff compression methods unknown value NULL 1 0.0479 (0.0243) S>C TCP FIN 1 0.0481 (0.0002) C>S TCP FIN Thawte provides two Java based SSL Checkers. The Legacy Thawte SSL Certificate Installation Checker and the sslToolBox. Both validate the certificate under Windows XP but report connection errors under OSX and Windows 2008 R2.

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  • How to wrap console utils in webserver

    - by Alex Brown
    I have a big dataset (100Mbs/day) and a bunch of console a TCL/TK tools to view it - I want to turn it into a web app that I can build, and others can maintain. In long: my group runs simulations yielding 100s of Mbs of data daily, in multiple (mostly but not only) text forms. We have a bunch of scripts and tools, mostly old school 1990's style stuff requiring a 5-button mouse, as well as lots of ad-hoc scripts that engineers build out of frustration every month or so. These produces UIs, graphs, spreadsheets (various sizes), logs, event histories etc. I want to replace (or at least supplement) the xwindows / console style UI with a web-based one, so I need the following properties: pleasant to program can wrap existing command-line tools in separate views (I don't need to scrape GUIs or anything) as I port logic from the existing scripts I can create a modularised and pleasant codebase to replace it I can attach a web-ui to navigate between views - each view is likely to contain keys which might make sense to view in another I am new to building systems that have logic on the back-end and front-end of a web-server. from that point of view, they do this: backend wraps old-school executables, constructs calls into them and them takes the output and wraps it up, niceifies it and delivers it to the web client. For instance the tool might generate a number of indexed images (per invocation) which I might deliver all at once or on-demand. May (probably) need to to heavy stats on some sources. frontend provides navigation connecting multiple views, performs requests from one view for data from another (or self to self), etc. Probably will have some views with a lot of interactivity. Can people please point me towards viable solutions for this? I know it's a bit of an open question so as answers come in I hope to refine the spec until we have a good match. I guess I expect to see answers like "RoR!" "beans!" "Scala!" but please give an indication of why those are a good fit; I know nothing! I got bumped off SO for asking an open-ended question, so sorry if its OT here too (let me know). I take the policy that I use the best/closest matched language for a project but most of my team are extremely low level (ie pipeline stages and CDyn) so I don't have the peer group to know where to start.

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  • Does Altova StyleVision support generation of these specific Word XML Word ML List Numbering Bullet Markup? Extend with custom external XSLT?

    - by Alex S
    Does Altova StyleVision support generation of these specific Word XML Word ML List Numbering Bullet Markup? Extend with custom external XSLT? PS: I know is specific to Altova and their Dev Tools, but just like Eclipse and Visual Studio it is one of the widest used toolkits for XML related development & programming. So, please do not hate, ban or give negative. Linked below is a section of information for Word ML XML and its numbering, list, bullet etc. The markup is pretty extensive. I am wondering if this can be replicated via StyleVision or is this a limitation that needs to extended with an external XSLT? Quote: Key links to the Markup Documentation: http://officeopenxml.com/WPnumbering.php http://officeopenxml.com/WPnumberingAbstractNum.php Also: /WPnumberingLvl.php Short outline of the Documentation there: *Numbering, Levels and Lists* - Overview - Defining a Numbering Scheme - Defining a Particular Level ++ Numbering Level Text ++ Numbering Format ++ Displaying as Numerals Only ++ Restart Numbering ++ Picture or Image as Numbering Symbol ++ Justification ++ Overriding a Numbering Definition If StyleVision supports the above, where and how inside StyleVision can I access or use these properties/ attributes for the markup? From what I've gathered, I think it does not. In the past, I have written XSL-FO and XSL-WordML by hand. So I could write an add-on external XSLT containing Word specific markup for this purpose. *Given the limitation exists, the questions now: * Where and how do I create and linked inside of StyleVision so as to APPLY and EXTEND these capability limitations of StyleVision. AND How could I make it apply only for Word ML / Word XML output styling and be DEACTIVATED/ DISABLED for HTML and PDF output?

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  • 12.04 on Pentium Dual Core with 1GB or ram running slow

    - by Alex
    hey i have a Lenovo Thinkpad Laptop with Ubuntu 12.04 installed. It runs slow. I tried "System profiler and Benchmark" to test the computer. but the application quits and closes after the first few benchmark test. before it even gets to the other tests. So i tried "Hardinfo" that installed on the Puppy Linux live cd. that did the same thing (the apps look just a like). the memory usage isnt the problem on this pc. its the cpu processes. just running the "system profiler" app that comes with ubuntu uses about 34% on each core, default with nothing running its 5-10% on each core. i cant really find what the deal is other than that ubuntu is a cpu hog. so im testing unity2D at the moment to see how it goes. if you have any other suggestions, feel free to answer this question. thanks

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  • Why does terminal auto complete sometimes not suggest anything?

    - by alex
    Sometimes, when I type a command on the terminal, the terminal's autocomplete does not work, even if my command is not wrong. For example, take look to this: sudo service vsftpd status sudo and service do not have any problem. I mean, when you type sud +tab terminal suggest you sudo or I type servi + tab terminal complete that to service. But for vsftpd I do not get any suggestion. Is there a way to say, "terminal, please tell me any suggestion!!?".

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  • What do you need to know to get a job as a web developer

    - by Alex Foster
    What do you need to know to at the very least get your foot in the door? We're assuming for someone who doesn't have a college degree (yet) but will eventually get one. My guess is html, css, javascript, and php, and photoshop and dreamweaver, and sql. And being familiar with using a web host to have sites live, like knowing how to use cpanel. It's probably a very inaccurate and narrow guess but that's what i think right now. I don't know exactly.

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  • Digital "Post It" notes for organizing content of sites/pages

    - by Alex
    We're restructuring our old intranet into a new one and are going through each site to find content and use our new standard structure/look-and-feel. Do you recommend a tool where you can do "digital Post-It" notes? It would provide a way to type some items on a "card" and be able to move it around and organize it quickly. Also, if you know of tools in general for this kind of task, please advise. Thank you.

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  • Outlook connected to exchange does not send email

    - by Thomas de Nooij
    I have multiple machines with Outlook 2010 connected to RackSpace hosted exchange server. Everything works fine, but emails send after a while since outlook started will not leave the outbox. Clicking Send & Receive will display the progress bar at 100% completed with no errors, but is not really finishing. The Cancel All button is still active. The emails in the outbox are bold & italic, so ready to be send. When I close outlook and start it again, the mails are sent immediately without problems. I have tried the following: Checked if there are any third party addins: only Microsoft Add ins Checked if the virus scanner is blocking anything, but McAfee is not doing this. Checked and Repaired the .ost file Increased the server time-out from 30 seconds to 60 seconds Nothing helped. Any suggestions?

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